H D 2 - D M - A / D M - A M
Installation in Hazardous Areas
Subject to reasonable modifications due to technical advances.
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11
Installation in Hazardous Areas
11.1
Safety Instructions
The Statement of Conformity and Certificate of Compliance of the Field-
bus Power Hub must be observed. It is especially important to pay at-
tention to any special conditions for safe use that are indicated.
Only devices which are suitable for operation in hazardous areas
Zone 2/Div. 2 and the conditions present at the place of operation (see
Statement of Conformity or Certificate of Compliance), are allowed to
be connected to non-energy limited circuits in Zone 2, resp. Class I,
Div. 2. or Class I, Zone 2.
In a Class I, Div. 2. or Class I, Zone 2 installation, connection or discon-
nection of the equipment at the trunk or changes at the switch compo-
nents on the motherboard are only allowed if the area is known to be
non-hazardous.
11.2
Installation of the HD2-DM-A in Conjunction with the
Power Hub within Zone 2 or Class I Div. 2 or Class I, Zone 2
As a part of the Fieldbus Power Hub system the Advanced Diagnostic
Module may be installed in Zone 2 and Class I Div. 2 or Class I, Zone 2
hazardous areas. The type of protection is EEx nA (non-arcing) for
Zone 2 Gas Groups IIC, IIB, IIA, and non-incendive for use in Class I,
Division 2 Gas Groups A, B, C and D or AEx nA for use in Class I,
Zone 2. Depending on the type of Fieldbus Power Supply used in the
Power Hub, different topologies and types of Zone 2/Div. 2 installations
are possible.
•
In a Zone 2 installation, connection or disconnection of energized non-
energy limited circuits is only permitted during installation, maintenance
or for repair purposes since the presence of an explosive atmosphere
during the short period of installation, maintenance or repair is consid-
ered as improbable.
•
If devices are operated in general electrical systems they must not there-
after be operated in electrical systems that are connected with hazardous
areas.